通过调节内皮TGF-β信号传递,LRG1促进血管生成
Xiaomeng Wang1, Sabu Abraham1, Jenny A G McKenzie1
1Department of Cell Biology, UCL Institute of Ophthalmology, London EC1V 9EL, UK.
Nature
|July 23, 2013
概括
富含白的α-2-糖蛋白1 (Lrg1) 通过与转化生长因子-β1 (TGF-β1) 相互作用,促进病态血管生成. 抑制Lrg1显著降低了眼球血管生成,揭示了它作为一个新的治疗点.
科学领域:
- 分子生物学分子生物学
- 眼科医生 眼科 眼科
- 心血管生物学 心血管生物学
背景情况:
- 异常的新血管化是癌症,失明和动脉样硬化等严重疾病的基础.
- 病理性血管新生是由失调的血管新生信号产生的,但关键的调节者仍然未被确定.
- 了解这些调节剂对于开发有效的疾病治疗至关重要.
研究的目的:
- 在视网膜微血管中识别病态血管生成的新型调节剂.
- 为了研究上调基因白丰富的α-2-糖蛋白1 (Lrg1) 的功能和机制.
主要方法:
- 从视网膜疾病的小鼠模型中对视网膜微血管的转录组分析.
- 在体外试验测试以评估LRG1对内皮细胞的真菌效应.
- 使用Lrg1淘汰赛小鼠和LRG1抗体阻断的体内研究.
- 分析LRG1与转化生长因子-β1 (TGF-β1) 和下游信号通路的相互作用.
主要成果:
- 富含白的α-2-糖蛋白1 (Lrg1) 被确定为病理性视网膜新血管化的上调基因.
- 与TGF-β1结合,LRG1促进内皮细胞的增殖和血管生成.
- Lrg1 缺乏减少了病态眼球血管新生,LRG1 阻断减弱了血管新生.
- LRG1直接与内分泌蛋白结合,调节TGF-β1信号向亲血管性Smad1/5/8通路.
结论:
- 富含白的α-2-糖蛋白1 (Lrg1) 是一种新的,重要的血管生成调节剂.
- LRG1通过与TGF-β信号通路相互作用来调解其亲血管效应.
- 向LRG1为具有病态血管生成特征的疾病提供了潜在的治疗策略.
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